http://www.thecoverproject.com/
This website offers printable DVD-case sized covers for a variety of games, so you can buy DVD cases and stick the games in them so your shelf doesn't look completely retarded. This is great if you've got games that have had their cases lost/destroyed. And apparently you can order large DVD cases for multiple-disc games like FFs 7-9. Some of them look a little cheap, but others are spectacular.